I am still not sure why it causes the page to display blank content when someone hit the site with the Facebook social plugin and URL parameter fb_xd_fragment.

Here is the temporary fix to display the content, however, it will disable the Facebook widget.

Problem:

I found this occurring on one of my sites using AddThis - and it affects
ALL browsers, not just Internet Explorer. Haven't figured out exactly
how or why it happens but the Facebook frame manages to set the parent's
element to display: none.